Blender in 3D printing
Yes, you can use Blender for 3D print modeling. Look for these addons:


"3DPrint Toolbox"
"Measureit"


These addons are not a must, but I highly recommend them, and I'm sure they will help you a lot.

Also I recommend these series:

https://store.blender.org/product/blender-for-3d-printing/

Is not free, but you save you a lot of time. You learn the correct workflow quick and with explanation, no like many people on YouTube who use Blender for two weeks (so they know almost nothing), and they think they can teach others :D